Engine / Transmission oils

Bel-Ray Thumper Racing Works Synthetic Ester 4T Engine Oil is a 4-stroke synthetic motorcycle racing oil that has been developed for full works competition use and is designed to withstand extreme racing conditions. Full synthetic ester base oils withstand the highest temperatures and stresses and provide the ultimate performance for 4-stroke motorcycles. Meets API SN and JASO MA2 requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. - Synthetic ester formula for the ultimate Thumper performance - Withstands extreme racing conditions - For air-cooled/liquid-cooled 4T engines with wet clutches

Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a 4-stroke motorcycle racing oil that combines the finest quality synthetic esters and highly-refined mineral base oils specifically engineered for today’s 4-stroke single cylinder, multi-valve racing engines. Provides maximum anti-wear protection for valve-trains, rings, cylinders and pistons. Delivers maximum horsepower while providing consistent clutch performance. Meets API SN and JASO MA2 requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. Synthetic ester blend for racing engines Maximum horsepower and consistent clutch performance Wear protection for valve-trains, rings, cylinders and pistons For air-cooled/liquid-cooled 4T engines with wet clutches

Bel-Ray Thumper Racing Works Synthetic Ester 4T Engine Oil is a 4-stroke synthetic motorcycle racing oil that has been developed for full works competition use and is designed to withstand extreme racing conditions. Full synthetic ester base oils withstand the highest temperatures and stresses and provide the ultimate performance for 4-stroke motorcycles. Meets API SN and JASO MA2 requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. - Synthetic ester formula for the ultimate Thumper performance - Withstands extreme racing conditions - For air-cooled/liquid-cooled 4T engines with wet clutches

Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a 4-stroke motorcycle racing oil that combines the finest quality synthetic esters and highly-refined mineral base oils specifically engineered for today’s 4-stroke single cylinder, multi-valve racing engines. Provides maximum anti-wear protection for valve-trains, rings, cylinders and pistons. Delivers maximum horsepower while providing consistent clutch performance. Meets API SN and JASO MA2 requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. Synthetic ester blend for racing engines Maximum horsepower and consistent clutch performance Wear protection for valve-trains, rings, cylinders and pistons For air-cooled/liquid-cooled 4T engines with wet clutches

Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a 4-stroke motorcycle racing oil that combines the finest quality synthetic esters and highly-refined mineral base oils specifically engineered for today’s 4-stroke single cylinder, multi-valve racing engines. Provides maximum anti-wear protection for valve-trains, rings, cylinders and pistons. Delivers maximum horsepower while providing consistent clutch performance. Meets API SN and JASO MA2 requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. Synthetic ester blend for racing engines Maximum horsepower and consistent clutch performance Wear protection for valve-trains, rings, cylinders and pistons For air-cooled/liquid-cooled 4T engines with wet clutches

- Designed for V-Twin bikes - Optimal clutch performance - Provides high stability, reduces heat - Improves power transfer through the clutch - Increases clutch life - Aids in shifting - Works with all wet clutch applications, including OEM/stock and aftermarket clutch options - Meets JASO-MA2 standards, which is the best possible standard for clutch performance -Has an API SL service category, meaning that it is a high-quality engine oil - More details below